Assigrnos to xekeyh



Sept. 11, 1923. 1,467,721 G. F OX FLUID PRESSURE REGULATOR Filed Oct. 6, 1921 Maw v my! Patented Iliept, ll, i923.

L NE'H'ED 1,457,721, rarest orsicn,

GORDON FOX, OF CHICAGG, ILLINOIS, ASSIGNOR T6 FEEYN, SRASSERT &, (10., OF CHICAGO, ILLINOIS, A CORPORATION GET EIIAIITE.

FLUID-PRESSURE REGULATOR.

Application filed October 6, 1921. Serial No. 535,863.

To all whom it may concern:

Be it known vthat I. Gonnon Fox, a citizen of the United States, residing at Chi cago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Fluid-Pressure Regulators, of which the following is a specification.

The present invention relates to fluid pressure regulators The invention. though of broad application, has been illustrated in connection with blast furnace construction. It is common practice to make use of the gas issuing from blast furnaces, though the pressure of the gases emitted by a blast furnace varies within wide limits. ln

order to maintain proper mixtures of gas and air for combustion, it is desirable that the fluctuations in the gas be reduced as much as possible. According to the presentinvention, a valve is installed in the main which conducts the gas from the blast furnace. said valve being operated in novel manner to maintain an improved uniformity of flow,

An object of the present invention is to provide means for regulating the flow of gas from. a blast furnace, whereby said gas may be more efliciently used for combustion purposes.

A further objectis to provide means for regulating the flow of gas from a blast furnace, which means include an automat ically o erating valve, which will produce an improved uniformity of flow without the use of delicate parts and without the objection of overrunning or hunting.

Further objects will appear as the description proceeds.

Referring to the drawings, Figure 1 represents diagrammatically a system employing one embodiment of the present invention though the details of the automatically operating valve are not fully disclosed in said figure; A

Figure 2 represents, in side elevation, an improved automatically operating valve, together with operating mechanism therefor; and

Figure 3 is a sectional view taken along the line 88 of Figure 2.

A gas main 10 is illustrated in Figure 1, which main may carry the gases issuing from a blast furnace. The gas carried by the main 10 may have passed through a heating blast furnace stoves 1212.

- trio motor washer and may be of suitable composition for use in burners. A series of pipes 1111 lead off from the gas main 10,, which pipes 11- 11 may conduct gas directly to various burners. Three burners are illustrated in Figure l by the numerals 12 12, which burners may be utilized tor The pressure of the gas delivered by the pipe 10 is automatically regulated by means of a valve 13, the construction ofwhich is shown in. detail in Figures 2 and As shown in Figures 2 and 3, the valv may take the form of a butterfly 14, which is supported by trunnions 1515, which may be mounted on a casting 16 encircling; pipe 10. Mounted onvone of the trunnions 15 is an operating member comprising the segment 17 and the counterweight 18. Said segment 17 has secured thereto the time ible rope or chain 19, which rides in a groove 20 of said segment. Said rope or chain 19 is adapted to be operated by a winch 21, which is controlled by an elec The counterweight 18 is so mounted relative to the butterfly that when said butterfly 14; is in closed position the counterweight 18 will have its maximum moment arm. As said butterfly moves toward the position of full opening, the moment arm or counterweight 18 will grudually decrease, whereby the effectiveness of said counterweight 18 will. decrease. As will be clear from Figure 2 the torque of the motor 22 is opposed to the torque set up by counterweight 18. A state of balance between these two opposing torques will result in holding said butterfly 1e stationary. A change of torque of motor 22 will cause the counterweight 18 to take up a new position in order to bring about a balance, resulting in an adjustment of butterfly 1 1. The motor 22 is connected across electric conductors 2323 of substantially constant voltage and is controlled by means of the rheostat 24. Said rheostat is provided with an arm 25, which is controlled by a gasometer 26, which has communication through pipe 27 with the gas line 10. A control panel 28 may be provided for mounting switches, instruments or other torque of motor 22 Will be held constant to hold the butterfly in a quiescent state. Any tendency toward fluctuation in the pressure of the gas in the gas pipe 10 will cause the gasometei- 26 to move the rheostat arm 25 to adjust the torque developed by the motor 22, whereby the butterfly Will take up a new position. Movement of the butterfly ll will affect the flow of? gas into the gas pipe 10, bringing the pressure back to normal.

It will be clear that the present invention provides means whereby a gas supply of improved uniformity of pressure may be had, regardless of large fluctuations at the source. The butterfly, being responsive to the opposing effects of two varying torques, will move positively, and without hunting, from one position to another whereby to control the flow of gas to render the pressure uniform. The disclosure herein is necessarily diagrammatic, and the features described are merely illustrative of the invention. It will be obvious that the actions of motor 22 and counterweight 18 on. butterfly l4: may be relatively reversed, if preferred; Further more, any other of the well known means-for varying the effectiveness oi the means opposing motor 22 may be employed. Other modifications will occur to those skilled in the art. It is intended in this patent to cover all such modifications that fall within the scope of the invention as defined by the appended claims.

I claim:

1. In combination, a gas main for conducting gas is ued from a blast furnace,

blast furnace stoves, burners for said stoves supplied from said gas main, means responsive to the pressure Within said main, a valve in said main, motive means for operating said valve, means opposing said motive means and adapted to counterbalance the effectof said motive means, said counterbalancing means having an effectiveness which varies progressively with changes in position of said valve, said motive mean-s being responsive to said pressure responsive means.

2. In combination, a pipe Within Which the pressure should be kept uniform, a valve controlling communication with said pipe, motive means for moving said alve in one direction, counterbalancing means for moving said valve in the opposite direction, said counterbalancing means having an eilectiveness which varies progressively with changes in the position of said valve and means re sponsivc to the pressure Within said pipe for controlling said motive means.

3. In combination, a pipe, a valve for controlling con'nnunication with said pipe, a motor for moving said valve in one direction, means having a varying moment arm for opposing said motive and counterbalancing same, said means being arranged to increase its moment arm with increases in the torque developed by said motor, said motor being responsive to the pressure Within said pipe.

Signed at Chicago, 111., this 26th day of Sept, 1921.

' GORDON FOX. 

